16704720 has 60 divisors (see below), whose sum is σ = 56102436. Its totient is φ = 4454400.

The previous prime is 16704713. The next prime is 16704731. The reversal of 16704720 is 2740761.

It can be written as a sum of positive squares in 2 ways, for example, as 11451456 + 5253264 = 3384^2 + 2292^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10881 + ... + 12320.

Almost surely, 2^16704720 is an apocalyptic number.

16704720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16704720 is an abundant number, since it is smaller than the sum of its proper divisors (39397716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16704720 is a wasteful number, since it uses less digits than its factorization.

16704720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23220 (or 23211 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 16704720 is about 4087.1408099061. The cubic root of 16704720 is about 255.6307338858.

It can be divided in two parts, 16704 and 720, that added together give a square (17424 = 132²).

The spelling of 16704720 in words is "sixteen million, seven hundred four thousand, seven hundred twenty".